[vsnet-alert 9900] Re: bright variable quasar QSO B0133+47

[Seiichi Yoshida]

Dear colleagues,

John greaves commented on this object and showed us many information
in details. Thank you, John!

I also researched the past Digitized Sky Surve POSS-I / POSS-II plates
using:

  USNO Flagstaff Station Integrated Image and Catalogue Archive Service
  http://www.nofs.navy.mil/data/FchPix/cfra.html

I selected one star with similar brightness around the quasar in each
plate. Here is the list with the magnitude in the USNO-A2.0 catalog.

1953.7810  18.7 mag  USNO-A2.0 1350-01532664  18.6R  18.9B
1953.7810  18.7 mag  USNO-A2.0 1350-01532664  18.6R  18.9B
1989.7426  17.8 mag  USNO-A2.0 1350-01531592  17.7R  17.9B
1989.7509  17.8 mag  USNO-A2.0 1350-01531592  17.7R  17.9B
1990.8268  18.7 mag  USNO-A2.0 1350-01532664  18.6R  18.9B
1991.7577  19.0 mag  USNO-A2.0 1350-01532064  18.7R  19.5B
1992.8008  18.7 mag  USNO-A2.0 1350-01532664  18.6R  18.9B
1992.9760  17.2 mag  USNO-A2.0 1350-01533365  16.9R  17.8B
1993.6222  15.8 mag  USNO-A2.0 1350-01532017  15.6R  16.1B
1993.7235  17.0 mag  USNO-A2.0 1350-01530812  16.9R  17.1B
1995.8207  15.8 mag  USNO-A2.0 1350-01532017  15.6R  16.1B

The quasar has been alwasy so faint as around 18 mag until 1992.
But at least two small outbursts were recorded in 1993 and 1995 up to
15.5-16 mag. 

However, the quasar was much brighter in the MISAO Project images on
2007 November 11 than any DSS plates above. The quasar was as bright
as a 14-mag star in the USNO-A2.0 catalog.

2007.8620  14.2 mag  USNO-A2.0 1350-01538026  13.9R  14.8B

So it can be an extraordinary great, brightest outburst of this
quasar. 

But John Greaves commented that the CMC14 and UCAC2 catalogs suggest
this quasar could be about 14-15 mag at their observations, in 2000 or
later. 

So maybe this quasar became much more active after 2000 than before.

Best regards,

> Dear colleagues,
> 
> I am Seiichi Yoshida working on the MISAO Project.
> 
> We discovered a variable quasar QSO B0133+47. It reached up to 14.0
> mag in 2007 November.
> 
> # I do not know how valuable this report is. Sorry if this is not
>   important at all...
> 
>   http://www.aerith.net/pub/QSO_B0133+47.gif
> 
> QSO B0133+47   	QSO  	 01 36 58.5948 +47 51 29.100   	   	 18.0V
> GB6 J0136+4751   	Rad  	 01 36 58.8   +47 51 27
> DA 55  01h36m58s.6 +47o51'29"  Mag:19.5  MagSystem:O  AbsoluteMag:-24.4  z:0.859
> USNO-A2.0 1350.01532368  01h36m58s.635 +47o51'29".19  Mag(R):18.3  Mag(B):18.5
> 
> QSO_B0133+47 20001201.46664 161C Mis
> QSO_B0133+47 20001201.46851 162C Mis
> QSO_B0133+47 20001201.47036 163C Mis
> QSO_B0133+47 20011211.46279 155C Mis
> QSO_B0133+47 20011211.46476 154C Mis
> QSO_B0133+47 20011211.46672 157C Mis
> QSO_B0133+47 20020102.40296 165C Mis
> QSO_B0133+47 20020102.40493 166C Mis
> QSO_B0133+47 20070912.81499 154C Mis
> QSO_B0133+47 20071006.75456 153C Mis
> QSO_B0133+47 20071111.62843 140C Mis
> QSO_B0133+47 20071111.63049 142C Mis
> QSO_B0133+47 20071111.63256 142C Mis
> QSO_B0133+47 20071203.51745 149C Mis
> QSO_B0133+47 20071203.51950 148C Mis
> QSO_B0133+47 20071203.52154 150C Mis
> 
> 2000 Dec. 1, 2001 Dec. 11, 2002 Jan. 2
>   Nobuo Ohkura
>   500-mm camera lens + SBIG ST-8
> 
> 2007 Sept. 12, 2007 Nov. 11, 2007 Dec. 3
>   Youichirou Nakashima
>   7.6-cm f/6.6 refractor + SBIG ST-8
> 
> 2007 Oct. 6
>   Nobuo Ohkura and Youichirou Nakashima
>   7.6-cm f/6.6 refractor + SBIG ST-8
> 
> Best regards,
> 
> --
> Seiichi Yoshida
> comet at aerith.net
> http://www.aerith.net/

--
Seiichi Yoshida
comet at aerith.net
http://www.aerith.net/